NORTHBOROUGH – An undercover sting by police led to the arrest of a Providence, Rhode Island woman and her suspected pimp at a Southwest Cutoff motel Thursday night, police said.

Luis Marrero, 25, and Hope Matta, 18, both of 137 Briggs St., Apt. 1, were both arrested at the Econo Lodge Thursday at 11:43 p.m.

Officers located an advertisement made by Matta on the website Backpage.com, which features advertisements for escorts, advertising services at the Northborough motel. An investigator exchanged text messages with Matta, who told the undercover office to go to room 222 of the Econo Lodge, Detective Sgt. Brian Griffin wrote in a police report filed in Westborough District Court.

"It was at this location that Matta met the undercover investigator and agreed to perform a sex act in exchange for money," Griffin wrote.

Officers found Marrero, who told police he is Matta’s boyfriend, in the bathroom. Marrero admitted to police he knew his girlfriend was working as a prostitute and she was expecting a customer, according to the police report.

Marrero told police he benefitted from Matta’s work as she would buy him things with the money she made as a prostitute, according to the police report.

"Marrero admitted that he does benefit because of Matta’s work," Griffin wrote in the police report.

Matta is charged with sexual conduct for a fee, while Marrero is charged with deriving support from a prostitute. The pair are due back in court May 21 for a pre-trial hearing.

Jeff Malachowski can be reached at 508-490-7466 or jmalachowski@wickedlocal.com. Follow him on Twitter @JmalachowskiMW.